Modelová Otázka ID 3255 - 
Během vychýlení oscilátoru do krajní polohy s výchylkou ym a silou o velikosti 0,05 kN byla vykonána práce 50 mJ. Jaká je velikost maximální výchylky oscilátoru ym, jestliže tento oscilátor od té doby kmitá harmonicky při frekvenci 5 Hz?
Správná odpověď je: B
Pro vychýlení oscilátoru do polohy maximální výchylky ym musela vychylující síla vykonat práci W = 50 mJ. Energie oscilátoru je v ideálním případě rovna práci, kterou vykonala síla vychylující oscilátor do krajní polohy. Velikost amplitudy ym je přímo úměrná vychylující síle. Při vynesení závislosti těchto dvou veličin do grafu odpovídá plocha pod křivkou práci, kterou bylo potřeba vykonat pro vychýlení oscilátoru do polohy odpovídající ym. Tato plocha má tvar pravoúhlého trojúhelníku a platí tak W = ½ · F · ym, tedy:
ym = (2 · W)/F = 0,1 J/50 N = 0,002 m = 0,2 cm.
| Cookie | Délka | Popis |
|---|---|---|
| _fbp | 3 months | Facebook sets this cookie to display advertisements when either on Facebook or on a digital platform powered by Facebook advertising after visiting the website. |
| _ga | 1 year 1 month 4 days | Google Analytics sets this cookie to calculate visitor, session and campaign data and track site usage for the site's analytics report. The cookie stores information anonymously and assigns a randomly generated number to recognise unique visitors. |
| _ga_* | 1 year 1 month 4 days | Google Analytics sets this cookie to store and count page views. |
| sbjs_current | session | Sourcebuster sets this cookie to identify the source of a visit and stores user action information in cookies. This analytical and behavioural cookie is used to enhance the visitor experience on the website. |
| sbjs_current_add | session | Sourcebuster sets this cookie to identify the source of a visit and stores user action information in cookies. This analytical and behavioural cookie is used to enhance the visitor experience on the website. |
| sbjs_first | session | Sourcebuster sets this cookie to identify the source of a visit and stores user action information in cookies. This analytical and behavioural cookie is used to enhance the visitor experience on the website. |
| sbjs_first_add | session | Sourcebuster sets this cookie to identify the source of a visit and stores user action information in cookies. This analytical and behavioural cookie is used to enhance the visitor experience on the website. |
| sbjs_migrations | session | Sourcebuster sets this cookie to identify the source of a visit and stores user action information in cookies. This analytical and behavioural cookie is used to enhance the visitor experience on the website. |
| sbjs_session | 1 hour | Sourcebuster sets this cookie to identify the source of a visit and stores user action information in cookies. This analytical and behavioural cookie is used to enhance the visitor experience on the website. |
| sbjs_udata | session | Sourcebuster sets this cookie to identify the source of a visit and stores user action information in cookies. This analytical and behavioural cookie is used to enhance the visitor experience on the website. |
| Cookie | Délka | Popis |
|---|---|---|
| lp_session_guest | 2 days | Description is currently not available. |
| uloha_switch | 1 day | Description is currently not available. |
